Diversity of headlamp auto-leveling SW functions according to IMU sensor performance

Headlamp auto-leveling is a concept that automatically levels the illumination angle of the vehicle headlamp by sensing the degree of tilt of the vehicle body. Most automobile manufacturers traditionally use 1 to 4 height sensors to implement headlamp auto-leveling, and the function and performance vary depending on the number of height sensors. An IMU sensor is a semiconductor-type electronic sensor that provides acceleration information in the x, y, and z-axis directions and gyro information for pitch, roll, and yaw. Headlamp auto-leveling technology can be implemented with an IMU sensor instead of a height sensor, and there are advantages to it. The advantages include a simpler vehicle production process and reduced wiring harnesses. Above all, the ECU material cost is reduced based on the same leveling performance compared to the height sensor. Just as the leveling performance improves as the number of height sensors increases, the IMU sensor has different headlamp auto-leveling functions and performances that can be implemented depending on the sensing specifications (number of axes, resolution). This paper studies the possible cases and performance of headlamp auto-leveling according to the performance of the IMU sensor.